Transmission mechanism for sewing-machines



B. WEINBERGER. TRANSMISSION MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAR.` I3, i919.

Patented N 0V. 30, 1920.

w wlll wir? 'e vf l HW vegas UNITED srarnsN earsar orties.

BENJAMIN WEINBERG-ER, Olt LOUIS, MISSURL .ELSE'IGNOR TO MARK t HAAS CLOTHING C0., OF ST. LOUIS, MISE-GURI, A CRPRATION.

Application. filed March i3,

To all whom t 'may concern:

Be it known that l, Bnnaaarrit l/VnrN- nnnenn, a citizen ot the United siding,I at the city et Slt. Louis and @tate o'l Missouri, have invented a` new and useiful Transmission li/lechanisi Tiewing chines, oii which the 'liollowine` a speciiication.

This invention relates to mechanism for sewing inacines.

in object et the invention is to provide a more eilicient and simple transmission inechanisin tor use in driving a sewingg1 inachine from a rotary shaft.

Another object o'f the invention is to providea inerhaniinn oi' the character describen oil which a nuinber thereof: inay be inountet upon a single rotary shaft and clliciently controlled to operate a corresponding nun ber of sewing niachines mounted on the support in connection withwhich the shaft is arranged. H

Another object ot the invention is to pro transmission vide a novel and eilicient mechanism ot the character described equipped with means ior driving the sewing machine at varying speeds. i

Other objects will appear from theiiollowing description in which reference is made to the drawing` illustrating, apreferred embodiment ot .the inventioin and` in which@ Figure l. is a view of the invention partly in section. v

Fig. 2 is a view looking; toward the transmission niechanisin troni the line 2-2 of Fig. l.

Fig, 3 is a sectional view illustrating; a modified 't'orin oi one part oi' the invention.

T he shaft l is revolubly journaled in bearings supported by hangers 2 secured to the underside oi a bench or table 3 arranged to support the sewing machines. rllhe shaft i is driven by any appropriate power de vice (not shown) and supports the transmis sion mechanism.

A clutch ineniber 4 is rigid with the shaft l and is in constant rotation when the shaft is rotating. ritt one side ofic the clutch inemn ber l the shaft supports a sleeve 5 upon which is loosely inonnted the hub 6 ot the cope'ating; clutch member.. In the form shown in Fig. l, the cooperating' clutch inember includes a dished disk 7 having a circumferential flange 8 which completely ensljaccneaton el' Letters Patent.

States.

Patented lllov. 3d, MMU.

191e. serial no. 282,404..

circles the clutch member fland extends beyond the outer side ofi? the periphery thereof a sullicient distance to prevent threads, pieces of cloth and other substances and material from becoming caught or entangled with the clutch meinber 2l. This loose clutch ineinber is formed with an internal groove in which is secured a quantity ot appropriete trictionalniaterial 9, such, for instance, as indurated liber er the like. 1When the loose clutch ineinber is inoved toward the clutch ineinber 4i the trirtion suri'ace, by engagement with the inclined periphery of the clutch ineinber et., causes the loose clutch member to be revolved along1 with the clutch member 1i. However.) when the pressure is released trein against the loose clutch nient ber it will nieve away from the clutch :uo-eniber Zl and will be promptly stopped 'from further rotation by a bralre device hereinalter described.`

As shown in Fing. lgthe loose clutch mein-- ber is termed with a number of belt receivinp; pulleys oi different diameters so that the belt7 driven troni the loose clutch`ynocnobor7 may be driven at diiii'erent selected speeds. ln the particular construction shown the periphery oi the loose clutch member is iornied with a belt receiving` pulleyl() which will drive the belt at ahigh rate of speed equal to the speed out rotation of the periphery et the loose clutch member. The (lished dish 7 isforrnedwith another belt receiving; pulley ll which is ot smaller diameter than the pulley l0 and will therefore drive the belt at slower `speed than will the pulley 10. Said dish 7 supports also a pulley l2 which is oi.E smaller diaineter than the pulley lh and a pulley ll-which is of smaller diameter than the pnlley The belt la may be con-` nected with either ot thepulleys shown and` can therefore be driven at inaryiner selected speeds from the sarne transmission member rotating' at an unvarying speed.

A. lever l5 is pivoted upon a support 1G and has a tor-lr i7 the arms oi whiclrextend on oppositesides ot the sleeve 5 adjacent to a washer i8 which is loose on the sleeve 5 at the end oit the hub 6 ot the clutch member. il. spring l5) hi one end connected to the lever 'l5 and the opposite end to the bench or table 3, and is effective to actuatc the lever to draw the toria l? away from the loose clutch ineinber and leave the latter disengaged lrorn the revolving clutchmeruber il., A brake shoe l 20 is carried by an arm ofthe lever 15 and When said lever is under control of the spring 19 the brake shoe is retained in contact with the surface of the fiange 8 on the loose clutch member While the latter is away from the clutch member l and preventingV any rota' tion of the loose clutch member. The lever 15 may bev operated by an appropriate connection 21 tol press the loose clutchY member into clutching engagement with the clutch member 4, at the same time releasing` the brake from the loose clutch member and leaving'the latter'in rotation with the clutch member 4.

TheV construction of the frictional. clutch surfaces of the clutch members provides for thereturii of the clutch'member 'T to off position when pressure against the member 7 by the clutch setting lever 15 is released.

The inclined clutchingsurface on the periph- Y ery of the vclutch member l tends to repel the clutch member .7 to.. off position and this tendency is assisted .by the brake 2O cooperating With the inclined peripheral.v sur face of the flange 8. As a consequence of this when pressure of theclutch lever against. the clutch member i7 is stopped the inclined y peripheral fric-tional yclutch surface of the clutch member 4 cooperates with the brake 2O acting on the Vinclined surfaceof the flange 8 to disengage the clutch member 7 from the clutch memberV 4, permitting the brake 2O to stop the clutch member 7 i As shown in Fig. l, thevarious pulleys are made integral with thedished dislr 7. l-loivever, if desired, the smaller pulleys may be formed separatelyand attached to tliedislr of thelargest pulley. Such construction is shown in Fig. 3 in which the disk 22 of largest pulley releasably supports a smaller Vpulley 23 secured thereto by screws 24. Also smaller pulley 25 may be releasably secured to the pulley 23 by screws 26; and an additional pulley 2T may be Secured to the pulley 25 by releasable screws 28. It is obvious that this construction may be v aried if desired. Y

Fromthe foregoing it'will'be understood that l haveprovided a very simple and efficient transmission mechanism which completely serves its purpose.' The particular construction and arrangement of the parts may be varied without departure from the principle of the invention, and I do not restrict myself to unessential features or details thereof. Y

What I claim is .1. Transmission mechanism, comprising a rotating shaft, a clutch member attached to said shaft and'having a frictional clutch surface which is inclined'relative to the axis of said member, a stationary support, a Vclutch on the first-named clutch member, a device for moving said second clutch member into clutching engagement with the inclined frictional clutch surface of the clutch nicmber Which is on the shaft, a circumferential flange on the second clutch member of greater 'idth than the periphery of the first clutch member inclosing` the entire periphery of the first clutch member in any position of the second. one, and a driven element operated by the second clutch member.

2. rTransmission mechanism, comprising a journal bearing, a shaft journaled for rotation in said bearing, a clutch member :1ttached to said shaft, an inclined frictionul clutch surface on the periphery of said shaft, a clutch member supported by said journal bearings independently of said shaft, an an` nular flange on the second clutch member arranged to inclose the periphery of the first clutch member in any position of the second one, a part on said second clutch member for engaging the inclined clutch surface on the first clutch member, a lever for moving the second clutch member as required to engage said part With the inclined clutch surface on the first clutch member, i device operated by said lever for coperating with said flange to move the second clutch member out of engagement with the first one, and a driven element operated by the second clutch member.

3. Transmission mechanism, comprising a journal bearing, a rotating shaft journaled in said bearing, a clutch member fixed on the shaft, a clutch member slidably and revolubly supported on said journal bearing independently of said shaft, inclined clutch surfaces on said clutch members arranged so that the first clutch member Will actuate the second clutchy member out of clutching engagement, a lever operable to move the second-named clutch member into clutching engagement with the other one, and means carried by said lever for cooperating with the seeond-named clutch member to disengage it from the other one.

4t; Peuter transmission mechanism, comprising a journal bearing, a clutch member journaled for rotation on said bearing. a rotating shaft journaled in said bearing, a clutch member fixed on said shaft, inclined clutch surfaces on said clutch members arranged so that the first clutch member ivill actuate the second clutth member out of clutching engagement, a lever operable to move the first-named clutch member into clutching engagement with the clutch member which is fixed on the shaft, and a brake actuated by said lever to stop rotation of the clutch member which is on the bearing While the clutch meinbei' Which is on the shaft continues to rotate.

5. Power transmission mechanism, comprising a journal bearing, a clutch member journaled for rotation on said bearing, a rotatmg shaft Journaled in said bearing, a

clutch member fixed on said shaft, inclined clutch surfaces on said clutch members arranged so that the first clutch member Will actuate the second clutch f member out of clutching engagement, a lever operable to move the first-named clutch member into clutching engagement `With the clutch me1nber which is fixed on the shaft, a brake actuated by said lever to stop rotation of the clutch member which is on the bearing While the clutch member Which is on the shaft continues to rotate, an element arranged to be driven by the first-named clutch member, and means for driving said element at selected rates of speed by the rotation of said clutch member at a single rate of speed.

6. Power transmission mechanism, comprising a journal bearing, a clutch member mounted for rotation on said bearing, a shaft journaled for rotation in said bearing, a clutch member fixed on said shaft, a lever operable to move the clutch member which is on the bearing into clutching engagement 'with the clutch which is fixed on the shaft, a device for moving said lever to position to permit the clutch member on the bearing to shaft and having an inclined peripheral clutch surface, a second clutch member movable into clutching engagement with the inclined clutch surface of the first clutch member in opposition to the tendency of the first clutch member to repel the second one, a peripheral surface on the second clutch member inclined in a direction opposite from the direction of inclination of the clutch surface on the first clutch member, a lever Jfor moving the second clutch member into engagement Withthe first one, a brake device carried by said lever for cooperating With the inclined surface on the second clutch member to move said second clutch member out of engagement with the first one and 'tcl stop rotation of said second clutch member, and means for actuating said lever to engage said brake device with said inclined surface.

BENJAMIN WEINBERGER. 

